Lathe-controlling mechanirm



H. L. BLOOD LATHE CONTROLLING MECHANISM 2 Sheets-Sheet 1 Filed Oct 6Get. 2

H. L, BLOOD LATHE CONTROLLING MECHANI SM Filed Oct. 6, 1919 2Sheets-Sheet 2 m M 0 m a Felonies et. 2, v

EEIAEQLD L. EEGGD, @E FLMNFEELD, NEW JERSEY, ASSZGNGE TUIXLE"BWEEFTE@EJD @QJEEYAHY, @F HEW EQEK, ill. "iii, Ah CORPQJRATKQN if)?NEW E J3EE.

LATHE-(EQETRQLLXNQ HECEAEQ Application filed mother s, 1919. hostel its.essence.

To all whom-it may concern:

Be it known that 'l, Henono L. noon, e citizen of the United States, anda resident of lPleinfield, in the county of Union and State of NewJersey, have invented certain new and useful Improvements in Lathe-Contholling Mechanisms, of which the following is e specification.

This invention relates to o lathe and perticnlerly to e mechanism forcontrolling the rotation of the lathe spindle and the movement of thecerriege, end to moons always at the hand of the operator forcontrolling such meehenism.

ltis on object of the invention to provide on improved mechanism of theshove chorecter end it is at particular object to secure easy anddirectcontrol thereof by mounting at controlling means on the movablecerrioge always within easy reach of the opens.-

r. it is it further and more specific ob ect of the invention to providea. mechanical loi'elte as 5. port of the improved mechonisni forcontrolling the operation of the spindle end mesns on the movablecarriage for controlling the operation of the in machines driven by itdirect current motor, the motor itself serves as o broke when power iscut oil and the oinistuse theeeof short circuit/ed in the usual manner.However, on alternating current motor corn not he need its it broke inthis manner and in lethes end like mochines using such it drive it isnecessary to of hrsliing. it is there ore a particular object of thepiesent invention to provide or control mechanism psiticolorly adoptedfor use in e lathe or like machine having an alternsting current motordtive, such mechonisin losing adopted to control both the nower enteiingthe machine end c hi'eke thereon.

i /lechines of shove cl'iitlibfitel require that the power and operationof the mo.

chine shell st ell times be under the direct end cosy control of theoperetor; accordingiy, 1 herein disclose it controlling device ogseestedicy e single handle pieced Within easy mesh of the operator end sdo otedby the some movement to operate tooth the grovide other moons derstoodthat the invention in its broad aspect is capable of other embodimentsand may be used in machines other then lethes. Reference to the claimsshould he mode to determine the scope of the invention.

Referring to the droning? Figure 1 is o. front view of the main-iportion of s lathe having the present vcntion embodied therein.

Fig. 2 is on end "view thereof looking the left end of Fig. i.

Fig. 3 is on eniei'ged detail plain view of: the principal elements ofthe control meshe nism Within the heodstocic of the lathe, the viewbeing taken with the cover piste 4:5; and the motor she-ft and its gentsremoved.

Fig. 4 is a cross section token on the line 44 of Fig. 3 looking indiiection of the arrows and showing the hreke mechanism and itsoperating ports.

Fig. 5 is a cross section taken on the line 5-5 of Fig. 4 looking in thedirection of the arrows and showing the relation oi the brake arms tothe broke rod.

Referring more specifically to the drawing, wherein a lathe embodyingthe present invention is shown, 1 represents the lathe bed, 2 theheadstock thereof, 3 the lathe spindle, 4i the movable tool carriage and5 the electric drive motor. The motor drive shaft 6 has two gears *l and8 slidshly splined thereon and adapted to mesh with the goers 9 end 10respectively on the coon? tershoft 11. The lathe spindle 3 is operotedby a system of gearing including speed change gearing, as shown in Bi.1, hetvveen the countershatt i1 and the lots spindle 8. The carriage tis operated. from the motor Eli tit!) and the usual system of gearing,including a portion oi the gearing just described, extending into thespeed change gear box at the left of Fig. '1 and thence to the carriage.Since this gearing specifically is not apart of the resent invention,further description thereogwill be omitted.

The control mechanism comprising the present invention will now bedescribed. The brake forming a part of this mechanism may be any form ofmechanical brake, but preferably it provide a friction brake as shown inthe drawino". ".io secure a solid structure for the brake mechanism, Tprefer to torinthe gears 9 and 10 in one piece with the hub 12 and thebrake drum 1% therebetween and integral therewith. The brake-shoeelement herein shown comprises two brake-shoe halves 14 and 15 pivotedat 16 between lugs ill-17 on the machine frame and having arms 18 and 19at the opposite ends thereof. These arms are normally held together withthe brake-shoe in contact with the drum 13 by means of a bolt 20extending therethrough end having spring 21 mounted. thereon between nut22 and arm 19. The arms are mounted between lugs W23 on the machinetrance and thereby held from any lateral movement.

As seen. in Figs. 1 and bracket 2-i on the exterior of the machine frameand support therein an electric control box 25 for controlling thecurrent delivered to the drive motor 5. As a simple means oi clearlyillustrating the invention, T show a push button 26 extending from thebox and normally held in this extended po sition by a spring within theher, the elec tric control switch wi hin the box thereby heir-1gnormnily held in an open position. The electric contacts within the boxare so arranged that inward movement of the control button wili operateciose the switch and start the motor.

As heretoitore stated, invention conn prises means on the movablecarriage for controlling the power control means the brake, and it isobvious that such elements could be controlled by separnte means on thecarriage or both be controlled by a single means. prefer to control both3, I provide a by a single handle on the carriage, which structure willnow be described. As a means for operating; both power control means,herein the button 26, and. the friction brake lei-45,11 rovide anopereting rod 2'? rnonnt Y ed at its ends in lugs Bit -915E end bracket28. The brake engaginggportion this rod, as shown most clearly in Figs.4 end 5, ex tends between the breire arms 18 end 19 and is notched atdiametrically opposite points 29 to receive the bloke arms therein. The

opposite end the rod is drilled thread,

ed no tit 36 to adustahlv receivean o crating c y a menses pin 31therein, such pin being locked in its adjusted osition by means of locknut 32. By the a justinent of this pin the rod may be made to engage thecontrolling button 26 at the. roper time relative to therelease of thebra e and vice versa. 1 also provide a collar 33 on the rod 27 toprevent excessive movement of the rod toward the control box 25.

in Figs. 1., 3, a and 5, the machine is shown in neutral position withthe electric current cut ofi and the brake free from the brake drum 13.lit will now be clear that movement of the operating-rod 27 to the rightwill force the push button 26 inward and close the switch to start themotor, and movement of the operating rod to the left will allow thebrake arms 18 and 19 to drop into the notches Q9 in the operating rod,thereby applying the brake to stop the machine.

As heretofore stated, machines of this type require that the power andoperation thereof shall at all times be under the direct and easycontrol oi the operator. Various constructions might be devised wherebythe operating rod 27 could be operated by means placed within the reachoi the operator...

However, I prefer to secure such control herein by a system ofshe/fitting whereby an operating handle is mounted directly on the toolcarriage always in front of the operator.

Referring to l 2 and 3, it will be seen that a sector 34: having toothedengagement 35 with the operating rod 27 is mounted on a verticaloperating" shaft 86 at the-hack of the lathe, This shaft extendsdownward within the lathe housing and through bevel gears 37 hascperntive engagement with a short transverse shaft 38 which in likemanner through bevel gears 39 has operative engegement with a shaft 40extending along the tower portion or" the front of the lathe bed.Brachets eii 1-2 on the tool carriage support short shaft 43 hsvin anoperatin5; handle 4; st the top thereo A hovel t5 mounted on the lowerend of the sh engages a like gear 41-6 mount/ed bracket being; splinedat 4:7 for this purpose. Ey this construction end arrangement oi theshafts, the operator always has the operating handle directly at handand may thereby operate the rod Q7 and fully control the power andoperation of the lathe directly the tool carriage.

Whnt ll claim is:

Tn machine of the class eihed, the combination ct bed, a carriageinoveble thereon, headstock, a driving shat't rotatnhly mos-rated in theheadstoch, power con trol means remote from the shaft, e brake coopersing with the shatt, means mounted. the ,c-,dstocir lnterelly oi? theshort and n 4 w coopereting with the power control means i2 and slidablykeyed to shaft 40.,

neonate and the brake, and mechanism'including a handle on the carriageand an operative connection therefrom to the second named means forcontrolling both the power and brake.

2. In a machine of the class described, the combination of a bed, acarriage movable thereon, aheadstock,a driving shaft rotatably mountedin the headstock, power control means remote from the shaft, a brakecooperating with the shaft, an element mounted in the headstocklaterally of the shaft and cooperating with the power control means andthe brake, a handle on the carriage, and a system of shaftingoperatively connecting the handle with the element whereby the elementmay be moved in one direction to release the brake and apply the poweror in the other direction to interrupt the power and apply the brake.

3. In a machine of the class described, the combination of a bed, acarriage movable thereon, a headstock, a driving shaft rotatably mountedin the headstock, power control means remote from the shaft, a brakecooperating with the shaft, a rod mounted for axial movement in theheadstock laterally of the shaft and cooperating with the power controlmeans and the brake respectively along diilerent portions of its length,a handle on the carriage, and means including a splined shaft extendingalong the carriage for operatively connecting the handle to the rod,movement of the handle and rod in one direction being adapted to releasethe brake and apply the power and movement thereof in the otherdirection being adapted to interrupt the power and apply the brake.

4. In a machine of the class described, the combination of a a carriagemovable thereon, a headstock, a driving shaft rotatably mounted in theheadstock, power control means remote from the shaft, a brake drum onthe shaft, a pair of brake shoes surrounding the brake drum, :1 springnormally engaging the shoes with the drum, a rod mounted in theheadstock laterally of the shaft and cooperating with the powercontrolled means and the brake shots-and mechanism including a handle onthe carriage and an operative connection therefrom to the rod forcontrolling both the power and brake, movement of the handle and rod inone direction being adapted to separate the brake shoes and apply thepower and movement thereof in the other direction being adapted tointerrupt the power and to permit the spring to engage the shoes withthe drum.

' 5, In a machine of the class described, the combination of a bed, acarriage movable thereon, aheadstock, a spindle rotatably mounted in thehestock, a mechanical brake cooperating with the spindle, a motor fordriving the spindle, a switch for con &

trolling the motor, controlling means cooperating with the brake andswitch, and a handle on the carriage opcratively connected to thecontrolling moans, movement of the handle in one direction being adaptedto release the brake and close the switch to 1'0- tate the spindle andmovementthereof in the op )osite direction being adapted to open theswitch and apply the brake to stop the rotation of the spindle.

'6. In a. machine of the class described, the combination of a bed, acarriage mov-- able thereon, a headstock, a. spindle rotatably mountedin the headstock, a mechanical brake cooperating with the spindle, amotor for driving the spindle, a switch for controlling the motor, anelement movable in op osite directions and cooper ting with the brake atone portion of its legth and with the switch at another portion thereof,and a handle on the carriage operatively connected to the element,movement of the handle and element in one direction being adapted torelease the brake and close the switch to rotate the spindle andmovement thereof in the opposite direction being adapted to open theswitch and apply the brake to stop the rotation of the spindle.

7. In a machine of the class described, the combination of a bed, acarriage movable thereon, a headstock, a. spindle rotatably mountedinthe headstock, a mechanical brake cooperating with the spindle, amotor for driving the spindle, a switch for eontrolling the motor, a rodmounted for axial movement in the headstock, one portion of the rodcooperating with the brake, a pin. adjustably mounted on the rod andcpoperating with the switch, a handle on the carriage, and meansincluding a splined shaft extending along the carriage for operativelyconnecting the handle to the rod, movement of the handle and rod in onedirection being adapted to release the brake and close the switch torotate the spindle and movement thereof in the opposite direction beingadapted to open the switch and apply the brake to stop the rotation ofthe spindle.

8. In a machine of the class described, the combination of a bed, acarriage movable thereon, a headstock, a spindle rotatably mounted inthe headstock, a power control moans and a brake cooperating with thespindle, means mounted in the headstock and cooperating with the powercontrol means and the brake, a handle on the carriage, and a system ofshafting including a splined shaft extending along the bed andhorizontal and vertical shafts respectively connected thereto in theheadstock for connecting the handle with the said means, the arrangementbeing such that movement of the handle in one direction is adapted torelease the brake and apply the power to rotate the spindle andmovementthereof in

